import 'package:enjoy_plus_community/utils/http.dart';
import 'package:enjoy_plus_community/utils/toast.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:geolocator/geolocator.dart';
import 'package:permission_handler/permission_handler.dart';

class LocationList extends StatefulWidget {
  const LocationList({super.key});

  @override
  State<LocationList> createState() => _LocationListState();
}

class _LocationListState extends State<LocationList> {
  String apiKey = '2c2bb2f3f4ad4bedc326c5bed2b19ca5';
  double longitude = 22.568707;
  double latitude = 114.093170;
  String baseUrl = 'https://restapi.amap.com/v3';
  String province = '';
  String city = '';
  String district = '';
  String township = '';
  List nearbyCommunities = [];
  @override
  void initState() {
    super.initState();
    initPlatformState();
  }

  Future<void> initPlatformState() async {
    // 请求位置权限
    requestLocationPermission();
    // 获取当前设备的位置信息
    getCurrentLocation();
    reverseGeocoding(latitude, longitude);
    queryNearbyCommunities(latitude, longitude);
  }

  Future<void> requestLocationPermission() async {
    PermissionStatus status = await Permission.location.request();
    if (status.isGranted) {
      // 权限未授予
      ToastUtil.showSuccess('位置权限授予');
    } else {
      // 权限未授予
      ToastUtil.showError('位置权限未授予, 请去设置中心开启');
    }
  }

  /**
 * 异步获取当前设备的位置信息。
 * 
 * 此方法首先根据设备的平台（Android、iOS/macOS 或 Web）配置不同的定位设置，
 * 然后使用这些设置获取设备的当前位置，并处理位置信息或异常。
 */
  Future<void> getCurrentLocation() async {
    late LocationSettings locationSettings;

    if (defaultTargetPlatform == TargetPlatform.android) {
      // 针对Android平台，设置高精度定位、100米距离过滤、强制使用位置管理器等
      locationSettings = AndroidSettings(
        accuracy: LocationAccuracy.high,
        distanceFilter: 100,
        forceLocationManager: true,
        intervalDuration: const Duration(seconds: 10),
        foregroundNotificationConfig: const ForegroundNotificationConfig(
          notificationText:
              "Example app will continue to receive your location even when you aren't using it",
          notificationTitle: "Running in Background",
          enableWakeLock: true,
        ),
      );
    } else if (defaultTargetPlatform == TargetPlatform.iOS ||
        defaultTargetPlatform == TargetPlatform.macOS) {
      // 针对iOS和macOS平台，设置高精度定位、健身活动类型、100米距离过滤等
      locationSettings = AppleSettings(
        accuracy: LocationAccuracy.high,
        activityType: ActivityType.fitness,
        distanceFilter: 100,
        pauseLocationUpdatesAutomatically: true,
        // 只有在应用在后台启动时才设置为true
        showBackgroundLocationIndicator: false,
      );
    } else if (kIsWeb) {
      // 针对Web环境，设置高精度定位、100米距离过滤、5分钟的最大年龄等
      locationSettings = WebSettings(
        accuracy: LocationAccuracy.high,
        distanceFilter: 100,
        maximumAge: const Duration(minutes: 5),
      );
    } else {
      // 对于其他平台，默认设置高精度定位和100米距离过滤
      locationSettings = const LocationSettings(
        accuracy: LocationAccuracy.high,
        distanceFilter: 100,
      );
    }

    try {
      // 使用配置好的定位设置获取当前位置
      Position position = await Geolocator.getCurrentPosition(
        locationSettings: locationSettings,
      );
      // 显示成功获取到的纬度和经度
      ToastUtil.showSuccess('${position.latitude}, ${position.longitude}');
    } catch (e) {
      // 处理可能出现的异常
      print(e.toString());
    }
  }

  Future<void> reverseGeocoding(double latitude, double longitude) async {
    String url =
        '$baseUrl/geocode/regeo?key=$apiKey&location=$latitude,$longitude';
    try {
      var response = await http.get(url);
      print(response['regeocode']['addressComponent']);
      setState(() {
        province =
            response['regeocode']['addressComponent']['province'].toString();
        city = response['regeocode']['addressComponent']['city'].toString();
        district =
            response['regeocode']['addressComponent']['district'].toString();
        township =
            response['regeocode']['addressComponent']['township'].toString();
      });
    } catch (e) {
      print('查询过程中出现错误: $e');
    }
  }

  Future<void> queryNearbyCommunities(double latitude, double longitude) async {
    String url =
        '$baseUrl/place/around?key=$apiKey&location=$longitude,$latitude&radius=500&types=住宅小区';
    try {
      var response = await http.get(url);
      for (var element in (response['pois'] as List)) {
        print(element['name']);
        setState(() {
          nearbyCommunities.add(element);
        });
      }
    } catch (e) {
      print('查询过程中出现错误: $e');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('选择社区')),
      body: ListView(
        padding: const EdgeInsets.all(10),
        children: [
          const Row(
            children: [Text('当前地址', style: TextStyle(color: Colors.grey))],
          ),
          const SizedBox(height: 10),
          Container(
            color: Colors.white,
            padding: const EdgeInsets.all(10),
            child: Row(
              children: [
                Expanded(child: Text(province + city + district + township)),
                GestureDetector(
                  onTap: () {
                    reverseGeocoding(latitude, longitude);
                  },
                  child: const Row(
                    children: [
                      Icon(
                        Icons.location_searching_outlined,
                        color: Colors.blue,
                      ),
                      SizedBox(width: 2),
                      Text('重新定位', style: TextStyle(color: Colors.blue)),
                    ],
                  ),
                ),
              ],
            ),
          ),
          const SizedBox(height: 10),
          const Row(
            children: [Text('附近社区', style: TextStyle(color: Colors.grey))],
          ),
          const SizedBox(height: 10),
          ListView(
            shrinkWrap: true,
            physics: const NeverScrollableScrollPhysics(),
            children:
                nearbyCommunities
                    .map(
                      (item) => GestureDetector(
                        onTap: () {
                          Navigator.pushNamed(
                            context,
                            '/building_list',
                            arguments: {'point': item['name']},
                          );
                        },
                        child: Container(
                          color: Colors.white,
                          padding: const EdgeInsets.all(10),
                          child: Row(
                            children: [
                              Expanded(child: Text('${item['name']}')),
                              const Row(
                                children: [
                                  Icon(
                                    Icons.arrow_forward_ios,
                                    size: 16,
                                    color: Colors.black,
                                  ),
                                ],
                              ),
                            ],
                          ),
                        ),
                      ),
                    )
                    .toList(),
          ),
        ],
      ),
    );
  }
}
